/*
* Operating system has died. Known functions will be killed
* after memmove.
*
* Make sure stack is not used.
*/

void __attribute__((noreturn)) copy_and_restart(void *dst_void, const void *src_void, long length)
{


	{
		char *dst = dst_void;
		const char *src = src_void;

		if (src < dst && dst < src + length) {
			/* Have to copy backwards */
			src += length;
			dst += length;
			while (length--) {
				*--dst = *--src;
			}
		}
		else {
			while (length--) {
				*dst++ = *src++;
			}
		}
	}

//    int i, N;
//    N = 5000000;
//    *((volatile int *) 0xc02200d4) = 0x46; // Turn on LED
//    for (i=0; i<N; i++) // Wait a while
//    {
//             asm volatile ( "nop\n" );
//    }
//    *((volatile int *) 0xc02200d4) = 0x44; // Turn off LED
//    for (i=0; i<N; i++) // Wait a while
//    { 
//            asm volatile ( "nop\n" );
//    }

	asm volatile (
		"MRS	R0, CPSR\n"
		"BIC	R0, R0,	#0x3F\n"
		"ORR	R0, R0,	#0xD3\n"
		"MSR	CPSR, R0\n"
		"LDR	R1, =0xC0200000\n"
		"MOV	R0, #0xFFFFFFFF\n"
		"STR	R0, [R1,#0x10C]\n"
		"STR	R0, [R1,#0xC]\n"
		"STR	R0, [R1,#0x1C]\n"
		"STR	R0, [R1,#0x2C]\n"
		"STR	R0, [R1,#0x3C]\n"
		"STR	R0, [R1,#0x4C]\n"
		"STR	R0, [R1,#0x5C]\n"
		"STR	R0, [R1,#0x6C]\n"
		"STR	R0, [R1,#0x7C]\n"
		"STR	R0, [R1,#0x8C]\n"
		"STR	R0, [R1,#0x9C]\n"
		"STR	R0, [R1,#0xAC]\n"
		"STR	R0, [R1,#0xBC]\n"
		"STR	R0, [R1,#0xCC]\n"
		"STR	R0, [R1,#0xDC]\n"
		"STR	R0, [R1,#0xEC]\n"
		"CMP	R4, #7\n"
		"STR	R0, [R1,#0xFC]\n"
		"LDMEQFD	SP!, {R4,PC}\n"
		"MOV	R0, #0x78\n"
		"MCR	p15, 0,	R0,c1,c0\n"
		"MOV	R0, #0\n"
		"MCR	p15, 0,	R0,c7,c10, 4\n"
		"MCR	p15, 0,	R0,c7,c5\n"
		"MCR	p15, 0,	R0,c7,c6\n"
		"MOV	R0, #0x40000006\n"
		"MCR	p15, 0,	R0,c9,c1\n"
		"MCR	p15, 0,	R0,c9,c1, 1\n"
		"MRC	p15, 0,	R0,c1,c0\n"
		"ORR	R0, R0,	#0x50000\n"
		"MCR	p15, 0,	R0,c1,c0\n"
		"LDR	R0, =0x12345678\n"
		"MOV	R1, #0x40000000\n"
		"STR	R0, [R1,#0xFFC]\n"
//		"LDR	R0, =0xFF810000\n"      // original jump-vector
		"MOV     R0, %0\n"              // new jump-vector
		"LDMFD	SP!, {R4,LR}\n"
		"BX	R0\n"
		: : "r"(dst_void) : "memory","r0","r1","r2","r3","r4"
		);

	while(1);
}

